How should requirements be expressed to support the design process of advanced software? This is what this report contributes based on facts from qualitative research methods performed at Ericsson Software Technology. The design process studied is influenced by different ways of expressing the requirements, problem-oriented and solution-oriented. The problem-oriented way of expressing requirements supports the designers to keep the overall picture of the product and make visions possible in the requirement handling process. The study also points out that the problem-oriented way of expressing requirements facilitates distributed software projects.